Message 70151 - Python tracker

Well, os.path.supports_unicode_filenames is False on posix platforms.
So os.path.abspath is not supposed to work with unicode values.

I was about to close the issue, but python 3.0 also defines
supports_unicode_filenames to False! In addition, os.getcwd() fails when
the current dir has non-ascii characters. Should we drop its
implementation, and use os.getcwdu instead?